And here's the spreadsheet with the data.
And here's a photo of him. You can see his weight still looks normal, despite the weight loss.
A few more details:
- He is now 49 oz, the lowest weight I've seen him. The previous low was 50 oz, shortly after I adopted him. He has been as heavy as 57 oz at times.
- I have not been as diligent as I should be in terms of weekly weighing. My weighings have typically ranged from once per week to once per month. I am now trying to do better.
- He seems to be behaving normally and eating mostly normally. He and his brother Moon seem to be leaving over more green leaf lettuce than usual, but they seem to be eating bell peppers, pellets, and (I think) oat hay just fine.
- He looks healthy physically. He's been a chubby boy for a while, and now he looks closer in body shape to Moon.
- His diet has not changed significantly from here, though now I hand feed him carrots too as a treat.
- A few weeks before his weight began declining, I accidentally tipped an almost full Midwest cage box onto him. I took him to an emergency vet (not specializing in guinea pigs) and they could not find any problem with him. This visit included x-rays, reviewed by a vet radiologist who specialized in exotics. (It was an expensive visit.) He behaved very frightened after that, but went back to normal a few days later.
- I took him to his usual vet a month ago. The vet said he looked very healthy and saw no issues that concerned him. I have a positive impression of this vet in terms of his knowledge about guinea pigs, so I think he probably knows what to look for. I did not mention weight loss during this visit because the trend was not yet obvious.