Good info to have. We seem to need it frequently here.
Lori, if it were me I'd stop his suffering. It sounds like either injection site that Stefan mentioned would be relatively easy.
Remember, there's no wrong answer here, just listen to your heart, evaluate his suffering, and go from there. Sorry you're having to make this decision
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Tami
Sly & Ella(elegans elegans)
Frick & Frack(marcianus/sirtalis)
Chance & Granite(canine & feline)
Shane & Nate(sub-adult humans)