Welcome to Justanswer! I am Dr. Altman and happy to assist you both today!
Sorry to hear Buffy is having issues with constipation. It might be related to treats being too rich for her, the stress of you being gone, or a combination of the two...
Hopefully the steps below will help her have a bowel movement but if this doesn't change, her appetite is not improving, or she has increased lethargy as well please consider a veterinary visit
1.) A high fiber food. This might include a light formula which will have a higher fiber content. This gives a dog a feeling of satiety and when the stomach is full there is an increased urgency to defecate which will help empty the colon. Since her appetite is waning this can be a mixture of white rice and lean boiled meat such as chicken.
2.) Add water to the meals which is important in defecation and motility because it aids in lubrication
3.) Regular walks. Leash walks are critical in emptying the colon completely. Especially an hour or so after meals. When the stomach is full the gi tract tends to start increased motility so there is a natural urge to defecate.
4.) Supplements along with the light formula can include white rice (reducing the diet to add this), 1 tbsp canned pumpkin, 1/2 tsp of miralax, carrots
As I mentioned previously, if this continues despite these recommendations it would be best to see your veterinarian to ensure there is no other issues such as with the anal glands, a motility disorder that might require medication to treat, or another metabolic cause of this issue
Please let me know if you have any additional questions today, I hope Buffy is feeling better soon
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