Never. We usually have two and sometimes 3 dogs in the house and wouldn’t have it any other way.
Lived in the same house over 25 years. Just replaced the furnace 3 years ago and it was 29 years old (original to the house).
New furnace is much more energy efficient. Definitely a stronger blower on the new unit. Had to change the filter more often when we first started it up (month or two). Both the sales rep and the installers said “don’t bother when I asked about duct cleaning.
Use the base nonwoven type filter. Change the filter about every 2-3 months in the “off-season”. Change every month December, January, February, July and August.