Lenie Posted May 7, 2019 Report Share Posted May 7, 2019 Does anyone have any information on the average age female border collies go into heat for the first time? At what age would you be concerned if she hasn't? Thanks! Quote Link to comment Share on other sites More sharing options...
Riika Posted May 7, 2019 Report Share Posted May 7, 2019 Mine are about 11 months. I’d start getting concerned if they didn’t have their first cycle by 18 months. Quote Link to comment Share on other sites More sharing options...
Journey Posted May 7, 2019 Report Share Posted May 7, 2019 I've had a few that went 22 months..no worries! Quote Link to comment Share on other sites More sharing options...
Lenie Posted May 8, 2019 Author Report Share Posted May 8, 2019 Thanks! Quote Link to comment Share on other sites More sharing options...
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