Ddog is 11 months and doing really well. She's part collie so needs lots of mental stimulation as well as physical exercise but is also a fussy eater. Game changer for us was sprinkling her food in a towel, rolling it up and letting her unravel before eating it- takes her a good 20 minutes and she eats the lot! I wish we'd known sooner.
Other (probably really obvious to experienced owners!) is to take the lead off when they are travelling in the car- when unsupervised she chews through the lead (not the harness securing her to the car yet thankfully!)
Are there any other obvious-to-experienced-owners tips that anyone would like to share?