my new small (baby) rat has some potty issues. like every time i wanna hold him i have to wait til hes peed n pooped cuz other wise he will just go when ever. will he ever learn to just hold it til i set him down. n also ever time the dog barks or sumthin like that he goes potty on me which i really do not like. i dont wanna have to stand at his cage holdin him over it n waitin til ive seen him pee n poop. will he learn to just not go while im holdin him