Trey won't eat

i know nothing about homecooked, sorry.

but what did help me with jason was adding raw egg or yoghurt to his kibble and rreeeaalllly mixing it up.

his teeth and gums are ok, right? might wanna check on that, just to be sure...?

 With Rascal, for a while I had to add canned dog food to his dry kibble and mix it all up together. Sometimes he would just eat the wet food, but at least that was full nutrition, too! Will Trey eat anything canned? Rascal likes the Solid Gold and Wellness canned ones, and he's pretty picky.

 Poor guy. I'm far from a nutritionist, but if this is just a temporary issue (i.e. planning to change his diet once the test results come in, but want him to be a healthy weight in the meantime) I'm inclined to suggest just feed him whatever he'll eat. Satin balls, something approximating homecooked, whatever... if it's only for a period of 2 weeks ish, I doubt any lasting harm would be done by a not-entirely-balanced diet. Once he's feeling better, hopefully his appetite will return, too!

If he's suspected of thyroid problems, don't put him on a high fat/high carb diet (ie, the satin balls). Hypothyroidism is a risk factor for acute pancreatitis.

There's an excellent page here on putting together a short term cooked diet: Dog Aware's diet page. Scroll down to see a sample diet that is simple and easy to put together and perfectly safe for most dogs, short term.  I'd use low fat meats like skinless chicken, turkey, pork loin, and low fat beef.  Be sure to also include a fish oil supplement in his diet to support his immune system and skin, which are weakened by thyroid insufficiency.

Oops, sorry ETA: - to adjust this recipe for his size, simply mix up the whole recipe and then feed him what he'll eat in one serving.  Then based on that, divide up the rest and freeze in single portions. 

For long term, I'd suggest either working with a consultant directly, or taking a look at one of the publications put out by Monica Segal on this page with suggestions for older dogs.

Good luck!  I hope you get some answers quickly - thyroid issues can be a bear but thankfully it's a relatively easy fix once you are on the right path. 

Right.  Just stay away from the high fat and high carb stuff.  Acute pancreatitis is something that can be triggered very suddenly and has severe long term implications for an older dog (assuming the dog survives) - it's far better for your dog to be underweight than to risk this.  If his weight becomes an acute concern (ie, he is not gaining or refusing to eat "normal" food), you need to go back to the vet.  This is additional information which may be a symptom of a different problem.

Oh good - he's eating :)      I agree with keeping it low fat - pancreatitis is nasty and can be deadly.     If he'll eat the homecooked see if you can start slowly adding in some canned to that - at least he'll get some "supplements" from it.      My dog does really well on the Wellness canned foods - stay away from the chicken tho - it has significantly more fat than the others.    Can you give him an extra meal during the day ?   A third meal can help put on weight.    Smaller meals throughout the day is also a good way to avoid pancreatitis.