Could better control of feral cat/dog populations in urban areas explain the observed increases in rat weights? What if fatter rats are easier and/or more desi

Could better control of feral cat/dog populations in urban areas explain the observed increases in rat weights? What if fatter rats are easier and/or more desirable prey? Why should a cat waste effort chasing after a fast, skinny rat when a fat one providing more calories is less likely to outrun it?