<human>: rescued my dog about a year ago from a shelter and have no background on him, unknown breed but was 4 years old and ill with heartworm. got the medical issue resolved quickly and with proper care so that isn't an issue. he is a big dog, ~90lbs, and it was fun keeping him calm around other dogs and such.

first the good, dog seems smart and is very loving. loves everyone and everything almost to a fault (more later) and is calm around the house.

bad: does not stop pulling when walking, does not listen to commands the first time and his name does not always get his attention.

where i need advice is this: inside he seems bored but will not play with me inside, or out. likes walks but is a big puller even when i use a holt to try and help. i want away from the holt but if i cant get away from it thats ok. i have tried using lots of treats but it seems even doing that each day it doesnt stick so i have to keep burning through them.

i dont know how to get him to better respond to his name and follow commands the first time. also tried various foods and settled on some high quality stuff but he doesn't always seem to want to eat it without something mixed in. anyone offer some suggestions? he does play with other dogs when able but gets carried away sometimes. he also has impulse issues when he sees other dogs or people and causes a big and embarrassing scene.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: dog seems bored inside but wont play, impulse issue and listening. would like to correct but only had him a year and he is a little older, ~5yrs.