She wants to die, the homeless man told me

I've been looking for La Perra since Tuesday.  The men who hang out at the Picnic on San Jacinto and Martin told me she had died.  That the owner had poisoned her.  That she was lying in the creek that runs under the Picnic where I first saw her.
Today, a small miracle.
At dark, I drove by again, and stopped.  I stepped out a bag of dogfood in my hand.  A homeless man came up to me, said "don't you remember me?"
He's one of the men who sleeps under the street, at the creek where La Perra walks.  Told me that she'd slept with him last night, that he tried to feed her but she refused to eat.
The owner bred her for puppies and then dumped her, he said, that he is a cruel man.  The homeless man's name is Juanillo, and he sleeps on a mattress with some blankets, and yes, I remember him now.
I gave him some food for La Perra, a leash, and my cell number.  And some money for him, too, he said that he works as a custodian for the store. 
He says that La Perra wants to die.