Animal rights groups forged a deal to rescue 1,500 beagles from a troubled Wisconsin research facility after chaotic protests led to the arrest of several activists last month — though the fate of hundreds of pooches left behind remains unclear. Big Dog Ranch Rescue and the Center for a Humane Economy negotiated a confidential agreement to purchase the 1,500 beagles for an undisclosed price tag from Ridglan Farms in Blue Mounds. Animal rights groups forged a deal to rescue 1,500 beagles from Ridglan Farms in Blue Mounds. Fox6 However, roughly 500 pups will remain at the controversial research lab while negotiations with animal rights groups continue, Fox6 reported. Big Dog Ranch Rescue is working to find homes for 1,000 of the dogs, and the Center for a Humane Economy will take the rest. Last month, Wisconsin cops used teargas and rubber bullets to fend off a horde of 1,000 activists who stormed Ridglan Farms armed with sledgehammers, prying tools and chainsaws.…