i would say there is plenty of marketspace for new ebooks on pets if you want to write about something other than dogs, which seems to be a reasonably popular subject in Clickbank.
birding is supposed to be incredibly popular, and i have seen a few ebooks in Clickbank dedicated to that subject, but the number of ebooks on birds as pets is small. maybe people prefer to look for birds rather than keep them as pets...
me, i like low maintenance pets, like my chia
