I don't understand why it would be necessary to choose between support for the prevention of child abuse and support for the prevention of animal abuse. Is it alright to abuse animals? Abuse is wrong whenever it occurs and to whomever it happens. Those who abuse animals are most likely to go on to abuse others, children included.
The problem of abuse is multifaceted and must be approached with vigor from all quarters; support must be heard against both child and animal abuse.
Those who feel child abuse is not given the attention it deserves need to get out there and make some noise. Do not condemn the attempts being made to help animals, but encourage others to join your cause in helping children. Together both causes will see improved outcomes for both children and animals.