pet travel
... that the Humane Society of the United States recommends avoiding pet travel by air if possible?
... that the <a href="./Humane_Society_of_the_United_States" id="mwBIc" rel="mw:WikiLink" title="Humane Society of the United States">Humane Society of the United States</a> recommends avoiding <b id="mwBIg"><a href="./Pet_travel" id="mwBIk" rel="mw:WikiLink" title="Pet travel">pet travel</a></b> by <a href="./Air_travel" id="mwBIo" rel="mw:WikiLink" title="Air travel">air</a> if possible?