You also must know difference between a pet and assistance animal or emotional support animal and act accordingly to the HUD, ADA  and other applicable laws and rules.

@Tim Lindstrom The Federal ADA standards are hard to meet. 

I was just wondering if charging a fee for that animal would cause and ADA problems.  

@Ada Guerin-HughesWelcome I’m a Realtor Let me know if you want any help

The major risk would be that you sign a contract/lease with them, and then they come after you to make necessary adjustments to the property in order to comply with certain ADA requirements.

After I hung up I thought "whoops I should not have said that since I can not refuse a service dog because of ADA." 

You can fatigue them by requiring certified copies of certificates, proof of animal immunization shots for X disease(s), frequent health inspections, frequent property inspection, etc.Or. you can seek legal assistance in drafting a new or amended lease terms which address these issues without putting your investment asset in jeopardy of a ADA lawsuit.

Storm ponds, storm sewers, fire suppression systems, parking, ADA, fire hydrants, roads and access, fencing, utility acces and sizing,  D.  

(ADA County)https://www.cbsnews.com/news/1...

It insured the GC doesn’t have any liens or major lawsuits, insures they follow proper safety protocols and Ada requirements, insured he Carrie’s workers comp and hires subs that carry it.