One group had searched from 7am until 1-2am the next day over the weekend.
About 100 people have been involved in the search so far, but at least 100 more have helped in other ways - dropping off pizzas and other items, supplying a portaloo, and bringing in a Weber to cook for volunteers.
"There's been a huge amount of commitment from people on this," Barry said.
While some helpers were friends and family of the owners, others had simply heard about Lucas on Facebook.
The local fire brigade has helped, and people have been bringing in thermal cameras and drones to search for Lucas.
"What has given us hope is that a number of people have heard yelps," Barry said.
The last yelp was heard about 10pm yesterday by a number of people.
"So we think we can hear him but we just can't find him. Unfortunately he just seems to yelp once."
There are fears Lucas is injured, and that his harness and lead may have snagged on something, trapping him.
The owners are "pretty devastated" but also "blown away" by the response from the community.
"There are a heck of a lot of good people out there."
Thanks to the quick response on the Givealittle page, the family have been able to confirm and book a helicopter, and are waiting for the weather to clear to get the chopper in the air.
It's hoped the helicopter search will begin in the next few hours.
The money will go towards the cost of a helicopter to search the area with thermal cameras, for up to two hours. Any funds left over will go to any bills Lucas or the family may have.