Complex sentence: It was registered as a distinct breed in the CFA, but fell out of favor by the mid- 1990s due to serious health issues; only 98 were registered between 1958 and 1995.
Split into simpler sentences: It was registered as a breed by the CFA but fell out of favor by the mid- 1990s due to serious health issues. In fact, only 98 were registered between 1958 and 1995.