Vomiting, regurgitation and soft stool

[jeanne & Lilly]

I hope I can make this clear, I'll try to be brief, but give enough information to get help.
Lilly will be 2 yrs mid January. She ate Honest Kitchen Preference for over a year. With Preference, I cooked either chicken or turkey breast, then switched to (10% fat) ground beef. The switch to beef was about 3-4 months ago. Suddenly a few weeks ago, she started skipping midday meals, then when she did eat she would regurgitate, or vomit after eating.
Without going into her day by day diet, if she vomited, her next meal would consist of beef, rice, sweet potato, or just plain rice. If no vomit (or regurgitation) in 12 hours, I'd add a little HK to her next meal. Once again food came back up. On the 4th day of this we went to the vet she did X-rays to R/O a blockage. There wasn't a blockage; she chalked it up to just a sour stomach, and of course she tried to sell me their crap food.
The vet suggested that Lilly eat rice and beef for several days. When I believed everything was back to normal I reintroduced HK, once again regurgitation; came to the conclusion that the vomiting and regurgitation were directly related to the HK, so no more HK.
After researching for a new food, I went with Orijen Regional Red. A very small amount went into her rice and beef. We got up to 1/4 cup but if I increased it a small bit, her stool was almost liquid. As of yesterday she is back on rice, beef and sweet potato. I didn't log her stool during this time, it was sometimes normal sometimes soft.
Also after the first episode, Lilly started biting and/or licking her bottom. So now I'm thinking maybe she has a parasite?
Should I just bring a stool sample to the Vet tomorrow? Or should I bring her in for testing? But what kind of testing should be done?
I should also mention she was bathed and anal glands were expressed the day after the X-rays were done. The very next day she started to smell. At first she smelled like popcorn, now she stinks like dirty shoes, socks and feet! The odor is all over, but strongest at the back of her neck, not in her ears.
Again, I hope I didn't jump around too much and ya'll can make sense of what I'm trying to say.
Thank you in advance for your help.

[Karen, Jasper and Jackdoodle]

Yes, this is not the time to make any changes if something is going on. When was her last BM?

How much food are you giving her at each meal? 

[jeanne & Lilly]

Last BM's Monday, the first was like pudding and second was normal.
3oz ground lamb and a cup of fresh sweet potato cooked in microwave.

[Karen, Jasper and Jackdoodle]

Well, she's getting plenty of food. I don't think there is much you can do right now except watch and wait. If she doesn't have a BM by tomorrow a.m., you may need to see the vet. It does sound like there may be an absorption issue. 

[jeanne & Lilly]

After lunch just now, she had what looks like 2.5 different BM's. 1 normal, the next very soft and the next small bit was mush.
If it is an absorption issue, is that IBS? Should she see an internist for that? And when?
Poor little girl, for over a year she had normal BM's until she stopped eating chicken or turkey.

[Karen, Jasper and Jackdoodle]

IF it's an absorption issue, it would be most likely be a form of IBD, which is Inflammatory Bowel Disease, very different from IBS, which is Irritable Bowel Syndrome. IBD, which is what JD has, is an uncurable immune-mediated disease similar to Crohn's disease in humans; IBS is a "nervous" stomach.  

Jeanne, why not try going back to the chicken/turkey diet again and see if that makes a difference? I don't think it could hurt at this point.  

[jeanne & Lilly]

Ok chicken and turkey it is.

It seems like read JD's story ages ago, I'm going to search for it now.

Thank you for all your help. A sick doodle is hard on the moms and dads, also. I am grateful we can share and get continued help and support here.
Happy New Year!

[Karen, Jasper and Jackdoodle]

Jeanne, I'm replying here because there's no more room under your most recent post about the recurrence of the diarrhea.

I really think at this point, you need to consult an internal medicine specialist. Something is going on with Lilly's GI system, and I think it needs to be reliably diagnosed. 

[jeanne & Lilly]

Thanks, I'm calling one today.