Ms Hill, 24, said her partner was with Gizmo at the side of the house at 13:00 BST on Sunday.
The local UAV Lost Dog Search & Rescue organization has also been encouraging people to check in unconventional areas for Gizmo.
Ms Hill added that she had never expected anything like this to happen to little Gizmo, despite the fact that previous incidents of seagulls snatching dogs had been recorded in the area.
"It carried Gizmo a fair way as we couldn't see him anymore".
You're probably wondering how a seagull managed to make off with a dog but you should know that it was a Chihuahua that was stolen in this brazen daylight robbery.
Another contributor, Hasi'smum, wrote: "Apparently he [Gizmo] was taken and flown more or less parallel with the main Marldon Road over the roofs down towards [and maybe further than] Ailescombe Drive". "Fortunately these types of incidents are very rare and not typical gull behavior", they told the outlet.
In other pet news, a man from Orlando, Florida is mourning the recent loss of his black chihuahua, Stink. She vowed to keep "looking every day" until Gizmo was found, the BBC reported.
In spite of the unusual circumstances of Gizmo's disappearance, Mr May said there was still hope the chihuahua would be found.
He owners, Rick and Michelle Riendeau of Brooklyn, Connecticut, were delighted to hear their dog was safe. They had believed their dog had fallen prey to wolves in a nearby forest. We got this dog when our kids were about seven and five, they're in their 20s now and have kids of their own.