Dog on heat

[akitajoe]

Is it possible to tell when a dog (bitch) will be on heat from the date of birth of the dog

[felinechums]

Most dogs enter their first oestrus at six months, then approximately every six months after that.

[lankeela]

Larger breeds tend to come into season for the first time later than smaller ones sometimes as late as 12 - 15 months.

All bitches are different and even litter sisters can be in at different times.

[lilacben]

my dog is eight and I still dont know when she is in season.vet says it must be so light we don't notice. she is a rough collie. Brenda

[pruney]

my CKC spaniel first came to season at 10 months and can be anything between 6-9 months between each cycle. my shih tzu first came at 5 months and is roughly every 5-6 months. But, strangely her summer season came early last year (whilst we were on holiday!) and this year it came again exactly a year to the day! How weird!?!
And they sometimes sync in with each other, either coming on one after the other or a week into one, the other will start but the CKC syncs in with my shih tzu not other way round