PLEASE HELP! PET FOOD DONATIONS NEEDED ( MANTECA )

I have for several years now, taken on the responsibility of trapping and releasing many feral cats (25-30 plus) in my neighborhood. I would take them to my local vet who would give a discount on spaying or neutering them. After releasing them back into my neighborhood where they were trapped, I would put out dry food for them on a daily basis. I have recently fell on very hard financial times and am unable to keep these animals fed. I am asking (actually pleading) for the public's help. I desperately need dry cat food! If anyone could help me in keeping these animals from rummaging through trash cans for food I would greatly appreciate it.