My yorkie is about 1 1/2 yrs old. We thought she might have had a heat cycle by now, but nothing. The only differences in her behavior is that lately she has been kinda having bowls more often and they are a little runnier than usual and she can't seam to hold it as long as usual....instead of running downstairs to her she runs into the closest bathroom and goes on the floor
. I haven't changed her diet or her routine. she is up to date on her shots and preventatives. Could this be a sign of her coming heat cycle? if not what are some signs and should I be concerned that she hasn't had it yet?