You work 9 hours and your dog is 10 months old. Daycare looks like the obvious answer, and for some households it is.
It is worth going in with your eyes open, because a good day and a bad day look similar from the car park.
The problem daycare genuinely solves
A dog alone from 8am to 6pm with no toilet break and nothing to do is a real welfare problem. Company, movement and a change of scene beat 10 hours of nothing.
For dogs who find being alone hard, breaking the day up removes hours of practice at panicking. That is worth a lot.
The problem it can create
A full day of high-arousal group play is not rest. Your dog comes home wired, cannot settle, and has spent 6 hours rehearsing nothing you asked for.
Relaxation is trained as a behaviour in its own right, in short repeatable sets below threshold. A room of adolescents at full speed is not where that gets built.
Adolescents also play badly with other adolescents. Two dogs at the same stage escalate each other, and neither one has brakes yet.
What to ask a provider
How many dogs are in a group, and how many staff are in the room with them?
How are dogs matched? Age, size and play style, or everybody in together?
How much actual rest time is there, where does it happen, and what is a dog resting in?
What happens when a dog is overwhelmed? You want a specific answer about a quiet space, not reassurance.
What do staff do when things go wrong between 2 dogs?
Can you look around at a busy hour rather than at 7am when the place is empty?
That fifth question is the one that matters most. Reward-based methods are what is recommended for training and behaviour change, and aversive methods carry welfare and behavioural risk.
If the answer involves a spray bottle, a shock collar, scruffing, pinning or vague talk about correcting, walk away. You do not need to debate it in the doorway.
The alternatives nobody offers you
2 days a week instead of 5, with the other days broken up differently.
A half day, so the afternoon is a nap at home rather than a fourth hour of wrestling.
A dog walker at midday, which gives movement and a toilet break without the group.
A neighbour or family member dropping in for 20 minutes.
A settled afternoon at home with a chew, a food puzzle and a mat.
Leaving your dog somewhere for a week is a different question with different answers, and it has its own article.
Safety note
Book a veterinary examination if your dog comes home coughing, limping, with wounds, off their food, or frightened of things that never bothered them. Sudden behaviour change warrants an examination, and pain frequently presents as a change in behaviour rather than as obvious lameness. New growling or snapping at home after daycare needs a qualified behaviour professional, not another booking.
Today's version, in one line: ring your provider and ask what staff do when 2 dogs fall out.