It may just be the lighting on your photograph, but the glass looks very white and clean - at odds with the antique proportions of the form. Older (c.1880) examples with this kind of 'disfigured' look are typically much more grey.
Whilst my Swedish one is similar to yours, it's not the same - look at the proportions of the snout, ears and the length of the body. Mine is much more aesthetically-pleasing, and the glass isn't terribly bright, which leads me to believe it's a slightly later example, but not modern.
Yours, from your photographs, seems to be a recent(ish) emulation of an antique fyldehund.
I wouldn't put too much stock in the stopper - these are fairly common and easily replaceable. Early ones tend to have a coarse handmade look, whereas the ones in our two decanters seem prevalent from the 1960s (or possibly earlier) up to present day.