Also, what are you going to be selling primarily? BPs? Because I gott the feeling from the word "constrictor" (even though pythons are technically constrictors, too) that you're doing boas.

I really do like the laboratory idea with the beaker/test tube and the snake, that is if it's minimalistic and cartoony. Wouldn't recommend fire. I don't think that the "lab" aspect really suggests or connotes animal testing. As long as the colors on the logo and website are upbeat (although, a black background is ) and the general atmosphere is neat and eyecatching as opposed to busy, sketchy-looking, or spooky.

I like graphic design, let me know if you want a draft or two for the logo.