Keep him on the Purina for the first few days ... the stress of him moving home is enough. Then make sure you do the gradual transition from the purina tot he new food. I like to gradually increase the new food every three days. My transitions take about 2 weeks!! Then once you've had him on the new food for a good 10 days to 2 weeks and everything is fine, start to play around by adding stuff!!
Kazzy is the woman!
I got Bullied and loving it!
Bella "Bullie" Rose, adopted on July 24, 2011