My 16 month old pomeranian has this little habit. When she was younger we bought her this big (for her) pink teddy bear thinking that she would bond to it like she did her last big pink thing that we got her (her first toy). Anyway, for a while she ignored it, but then over the last few month we have noticed a slightly disturbing trend. She will growl at it, attack, and then mount it and hump away for 20 minutes. She will then repeat it... over... and over... for hours. I know it can be normal for females to hump things, but she was going at it the other day and she was almost levitating because she was humping so hard. It's funny for us, but we had to be careful last time I brought her to my parents house because my brother doesn't quite understand the whole humping thing.
Please tell me I didn't get a nymph. She hasn't been spayed (yet), just got done with heat, and hasn't ever been bred if that matters.
Thanks