Animal welfare society

Today i took my puppy for a first vaccination the animal welfare society in philipi,the first thing i was asked by the person that's doing the vaccination,am i going to sterilize my puppy,i said i just want my puppy vaccinated,i will decide later,i was told by a person called savanah that if i don't sterilize my puppy they going to chase me away,how can they force me to do something against my will?i pay for the vaccination, previously they chased me away with another puppy that i didn't want to sterilize and my puppy died,what a cruel policy to have,they say they love animals but they cold hearted!