Our kittens are a year old and they are both fixed. However, Dashiell has been trying to mount his sister Mystery for the past couple of days.

We had a third (15-yr old) cat, but he sadly and suddenly passed away last week, so I don't know if this is something that might have set things off. Pippin never tried to mount either kitten, though he did his share of butt-sniffing.

The kittens also have roundworms, which they're now in treatment for. Again, little worried there as Dashie's been trying to nip the area RIGHT where we applied the meds on his sister to boot when he attempts to mount.

Any advice? We will be taking them to the vets next month anyway after the meds have 4-6 weeks to take affect.