Tracey, I do not want to scare you, but talk to the vet about whether Pepper should have a CBC (blood work). I have had the unfortunate experience that constiation can be a sign of kidney failure (or other things). So even though the congestion may not be a sign of this, he may be having other problems. Better to know for sure than to not know at all. Best of luck. Huge {{{{HUGS}}}} to you