Ok I know what it means . But what factor s should i take in to the desion to swicth Merlin on to a Sr. food Remeber hes a nutered couch potato ,seven years old and over weight he has been on a diet for 1 1/2 years with not much loss of poundage. I was thinking with his slower activity level may be I should switch to a sr. food . Advice any one.?
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