Petco brought the whole business but the question is what did they really buy it for? My guess would be that they brought it for is the product online/mail order part and not so much the selling of the livestock part, which outside of the DD items, all comes out of LA anyway, and Petco is based in SD, so the sell side is already there. Basically it probably was easier to buy the infrastructure that Dr F&S & LA have setup, as opposed to creating it themselves, and in time they'll probably change the name to Petco, which is already a national brand name that people know.
Now they may keep the name LA for the livestock, and by acquiring Dr F&S this will give them more of resources into fish, but the the question is there any reason, or enough profit, to keep the place in Wisconsin open in the long run.