The mustild family all have delayed
Implantation of the fertilized ova. They live in northerly climates
And mate in summer and have the kits next spring.

I think the biting is part of the constant urge to kill.

Our feral kitty Maya will watch the birds outside or play
Rough with Weezie then do a shredding on a paper bag
To vent her hunting needs. She is very sweet with us
And never bites us but this shredding thing is intense
For her. We've never had a cat do this, so we have to keep a
Paper shopping bag out for her. She throws the bits up in the air too.
Like plucking feathers!