"I like tae let him oot o his tank for a treat like. But dinni dae onything sudden tae gi him a fleg or he goes tense an tightens up somethin terrible."
Translated:
oniethin, oniething, onythin: anything.
"I like to let him out of his tank in the way of a treat you understand. But do not do anything sudden to give him a fright or he goes tense and tightens up something terrible."