Hi! And Welcome! I'm Jane. 'Mom' to Rainbow and Whisper. Pyrs have been a major part of my life for over 30 years & could never imagine ever being without them.
High quality food is of utmost importance no matter what breed you caretake. Old Roy AND Purina are so low on the scale to me that they're not even on the chart. The higher cost of quality food will be more than made up for in the overall health of your Pup. Right down to lower Vet costs, actually.
Pyrs are usually estimated to be heaver than they actually are, due to their lovely coat and such. This is why it's so important to have an accurate weight when giving even such things as flea & tick preventative to heartworm medication. Get him in for a wellness exame asap & heartworm testing, etc.
I fed Solid Gold for a long, long, time but now feed EVO to my 5 1/2 yr old and Innova to my now 2 yr old. No canned food, but home made topper of organics and still add the Solid Gold Seameal. Pyrs eat very little for their size. But exactly how much is an individual matter. You'll know by living with your Babe and observing his condition.
Thank you for adopting Harley! I'm looking forward hearing more and posting of pics.
Your sweet fellow is really going through an adjustment period. Pyrs like stability & structure and I'm sure once he feels moreso, he'll do you proud. As you will to him.
Again, welcome Max & Harley!