Need to think about how people wanting rabbit themed t-shirts are going to look for them. If I was looking I'd try searches like:
Rabbit t-shirt
Bunny t-Shirt
Rabbit Top
Bunny Top
I also want to catch people who are interested in a particular breed that might not be looking for a t-shirt to buy but on seeing one advertised might be tempted. So searches for particular breeds:
Angora Rabbit
Angora Rabbit gifts - is this too specific?
Overture offers a free
keyword suggestion tool that gives information on number of searches per month and a list of alternative suggestions.
It tells me:
Count/Term
217 rabbit t shirt
429 rabbit gift
29 gift lop mini rabbit - it's suggestion which shows some interest in individual breeds
2330 happy bunny t shirt - that's more like it, adding a happy rabbit design could be a good step.
516 bunny t shirt
140 playboy bunny t shirt - this is copyright so no good to me
128 funny bunny t shirt
92 bug bunny t shirt
34 energizer bunny t shirt
So as a t-shirt term, bunny is more popular that rabbit - need to remember that when writing copy.
On to breeds:
2257 angora rabbit
196 angora bunny
739 lop rabbit
420 bunny lop
1045 holland lop rabbit
784 mini lop rabbit
1233 dutch rabbit
253 dutch bunny
So when it comes to specific breeds, rabbit is more popular than bunny.
That's given me somewhere to start with keywords in my product/page descriptions and also a couple of ideas for new images.