10 1/2 month old female - she had her first heat cycle in August. Now she thinks she has puppies! She has made a nest in her dog crate, she's whiny, she took all her stuffed animals one by one and put them in her crate and cleans them - she thinks they are her puppies. She very protective of her crate now. The cats walk by and if they look at her in there, she snarls at them How long will this go on for? She's getting spayed before her next cycle for sure! I want to wait as long as I can for her growth but her heat cycle was difficult, then she got a bad vaginal infection and now this.