A.Pismo Clam wrote:
We are about to introduce 1 more sweet, all-black kitty to our other
two
tabbies which have been with us for 7 years.

Do we need another litter box to accommodate the newest, who is about
8
months old and 6lb. 4oz? The other two are about 10 lbs each.

Many thanks for taking the time to respond!

Alain

It depends. I had 3 grown cats on a single litter box. No problems.
Some say: number of litterboxes = number of cats + 1.