The first New World screwworm outbreak in Texas in 60 years is hindering efforts to move rescued dogs and cats out of crowded animal shelters to states where they would be adopted. U.S. officials have emphasized the parasite’s threat to the nation’s $113 billion cattle industry, but the screwworm fly can lay eggs that hatch into flesh-eating larvae in the wounds or mucous of any mammal. Several dogs have had infestations in southern Texas and southeastern New Mexico. All but a handful of states have placed new restrictions on importing animals. That's complicating the annual flow of dogs and cats from Texas to other states.