Dog Heat Cycle Tracking: Printable Chart for Breeders

Dog heat cycle tracking starts with a dated record of what you observed and the test results your veterinarian received. A useful chart keeps those details together without turning a calendar day, discharge color or isolated progesterone result into a breeding instruction.

Download the printable observation and laboratory log below. Use it for one female and one cycle, bring it to appointments, and keep it with the original laboratory reports.

FREE PRINTABLE LOG

Download the dog heat cycle tracking log

Keep observed signs, dated laboratory results, and your veterinarian's instructions together. Print a fresh copy for each female and cycle.

Download tracking logA4 PDF

US Letter PDF · Two pages · No signup required

A blank record for handwriting. Your veterinarian interprets the observations and results.

Daily observations, with room for notes

How to use the printable dog heat cycle chart

The two-page log separates everyday observations from laboratory results and veterinary instructions. Both US Letter and A4 versions provide the same fields. Print additional copies when you need more room.

Start with the female’s name or identifying ID and a cycle reference you will recognize later. Enter the date first signs observed, who noticed them, and your veterinarian’s contact details. Repeat the female and cycle identifiers on the second page so separated sheets can be reunited.

The first-observed date describes your records. It does not establish the exact biological start of the cycle. If you noticed signs after returning from a trip or taking over from another caregiver, record that uncertainty instead of filling in an assumed earlier date.

Use the remaining spaces as events occur:

• Enter the date, time and description of an observation on page one.
• Copy each progesterone report into the laboratory table on page two.
• Record your veterinarian’s interpretation or instructions, including the advice date.
• Write the next appointment as advised, with its time and relevant details.
• If breeding occurs, record its actual date, time and method in the optional section.

The blank rows do not prescribe a testing schedule. Ask your veterinarian when to observe, call, return for testing or review results.

The four stages of a dog’s heat cycle

The veterinary term estrous cycle includes proestrus, estrus, diestrus and anestrus. Visible signs form only part of the assessment; hormonal changes and examination findings also matter. Merck Veterinary Manual’s reproductive overview  (opens in a new tab) describes these stages:

These are descriptions, not dates to prefill on the log. Keep observed signs in the observation column and any stage assessment from your veterinarian in the instructions section. An observation such as “discharge lighter today” should remain an observation until it has been interpreted in context.

What to record during a heat cycle

Write what you actually noticed: a change in discharge, visible swelling, behavior or general well-being. Include when you saw it and any relevant circumstances. “Small blood spots noticed on bedding this morning” is more useful than “definitely day three.”

If more than one person is observing the female, use initials in the notes so a later question can reach the right person. Keep descriptions consistent enough to compare without inventing a scale that suggests clinical precision.

A missed observation is a gap, not evidence that nothing happened. Leave it blank or note that no observation was made. If you correct an entry, keep the original readable and label the correction. Add a continuation sheet rather than compressing several days into one vague summary.

A laboratory result, an appointment and an actual breeding are different events. Preserve their own dates. For example, the day a result arrives may be later than the day the sample was collected. Mixing those dates can make the sequence difficult to follow when your veterinarian reviews it.

Keep a progesterone test record with the original units

For every sample, the second page has room for:

1. Sample date and time: copy the collection details when supplied.
2. Original reported result: retain the report’s value, including any less-than or greater-than sign.
3. Units: copy the units printed on that report.
4. Lab, assay or analyzer: include the method information if supplied.

Keep the original reports with the chart. If a detail is missing, ask the clinic rather than guessing. A result reported as below a measurement limit is not an exact measurement at that limit.

Progesterone reports may use ng/mL or nmol/L, as shown in the University of Guelph’s laboratory reference  (opens in a new tab). Preserve the original units even if you later use a converted value in another tool. Label any conversion separately so it cannot be mistaken for what the laboratory reported. Changing units does not resolve differences between testing methods.

This matters when more than one clinic is involved. Iowa State University’s breeding-management service  (opens in a new tab) asks clients to coordinate outside testing and explains that progesterone machines can produce results that are difficult to compare. Before changing clinics or analyzers during a series, ask the veterinarian managing the breeding how to maintain a usable record.

Discuss serial progesterone results with your veterinarian

Merck’s breeding-management guidance  (opens in a new tab) emphasizes that a single absolute progesterone concentration does not identify a particular cycle stage. It also cautions that results from different testing methodologies are not interchangeable. Serial measurements help the veterinarian interpret the change over time.

Vaginal cytology and other examinations can contribute information alongside hormone testing. The appropriate approach depends on the female and the breeding being considered. Ask the veterinarian managing the case how the findings fit together and when another sample is needed.

Use the log’s instructions space for the actual advice you receive, with a date. If instructions change after a new result, add the update rather than silently replacing the earlier entry. Keep an appointment that is booked separate from a test that has already happened.

Review earlier cycles without assuming the next one will match

Keep each completed cycle’s sheets and laboratory reports together. Before another planned breeding, share the earlier records with your veterinarian. They provide a history to review, including what was observed, which tests were performed, and what happened afterward.

Useful questions for that conversation include:

• When should I contact the clinic after noticing signs?
• Where should samples be tested, and how should results be shared?
• Who will review a result if it arrives outside normal appointment hours?
• Which changes should prompt an earlier call?

A record from a previous cycle is a reference, not an instruction to repeat its appointment or breeding dates automatically.

When to contact your veterinarian

Arrange veterinary advice if the pattern is unexpected for this female or you are unsure whether a change belongs to a normal cycle. If she appears unwell, seek advice promptly rather than waiting for another scheduled test.

Pyometra is a potentially life-threatening uterine infection. Cornell’s veterinary guidance  (opens in a new tab) lists signs including poor appetite, lethargy, vomiting, increased thirst or urination, abdominal pain and weakness or collapse. An unwell female after a recent heat needs prompt veterinary assessment; collapse or marked weakness warrants emergency care.

Do not wait for visible discharge before seeking help. UC Davis explains that closed-cervix pyometra can occur without it  (opens in a new tab). These signs are not a diagnosis you can make from the chart. Bring the recent cycle dates and observations to the veterinarian assessing her.

Use calculators alongside the original record

The dog progesterone calculator provides timing estimates from entered results. Keep its calculated dates labeled as estimates, with the inputs used, and discuss them with your veterinarian before acting on a breeding plan.

For later planning, the dog pregnancy calculator accepts different date anchors. Preserve whether you entered a breeding date or a veterinarian’s estimate of ovulation. A calculated due date does not confirm pregnancy or set a delivery procedure.

The original observations and laboratory reports remain useful even when an estimate changes. Keep them available alongside whichever digital records you use.

HEAT RECORDS IN BREEDTRACKER

Track heat cycles and progesterone results in BreedTracker

Open a female's heat cycle to keep her start date and progesterone tests in one place. The heat-tracking features let you add each result in ng/mL, its sample date, and an optional time and laboratory or veterinarian name.

Review the details saved with each test

See the recorded results in sequence

Use the heat cycle's separate Notes section for dated observations and veterinary instructions. Keep the original reports alongside your records, especially when they include a different unit or assay details. Timing displays are estimates to discuss with your veterinarian.

Start tracking in BreedTracker

The printable log is available without an account. Enter your records separately in the app.