I think I got the balance right -- it is intended to be moving without being too sentimental -- as I've had a positive reaction to it.
Since I drew it, I've seen similar cartoons on the web. This is inevitable with topical cartoons. Any cartoonist who sat down to think about this subject may well have thought of K-9, who was inextricably linked to Sarah Jane, Sladen's Doctor Who character. And as death is the subject it's a short logical leap to a Greyfriars Bobby scenario.
Topical cartoons are drawn quickly and sometimes mistakes are made. There is one in this cartoon. I'll give points to any Doctor Who fan, or anyone else, who spots it! Comment below if you know.
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